Phosphide silicides orsilicide phosphides orsilicophosphides are compounds containinganions composed ofsilicide (Si4−) andphosphide (P3−). They can be considered asmixed anion compounds. They are distinct from thephosphidosilicates, which have the phosphorus bonded to the silicon. Related compounds include thephosphide carbides,germanide phosphides,nitride silicides, andantimonide silicides.
One preparation method is to heat a metal phosphide with silicon in a silica tube. Phosphorus must be prevented from evaporating. Another method is to use a liquid tin flux.
Phosphide silicides may be present as minerals. They are under investigation as photovoltaic materials.[1]
| formula | system | space group | unit cell Å | volume | density | comment | ref |
|---|---|---|---|---|---|---|---|
| Li10.68Si5P | orthorhombic | Pnma | a = 10.2434, b = 4.2788, c = 23.9767 Z=4 | 1050.89 | 1.52 | grey metallic; Si5 rings | [2] |
| Fe5PSi | hexagonal | P63cm | a=6.766 c=12.456 Z=6 | 493.83 | 6.82 | [3] | |
| Fe5(P,Si)3 | [4] | ||||||
| Fe7(P,Si)3 | [5] | ||||||
| (Fe,Ni)8(P,Si)3 | Perryite | [6] | |||||
| Ni2PSi | orthorhombic | Pbca | a=4.985 b=5.871 c=13.667 | 399.95 | 5.86 | [7] | |
| ZrCuSiP | P4/nmm | a=3.5671c=9.4460 | metallic | [8] | |||
| La4(P1−xSix)3-z | cubic | I43d | [9] | ||||
| Ce4(P1−xSix)3-z | cubic | I43d | [9] | ||||
| Ce4P1.77Si1.23 | cubic | I43d | a=8.9359 Z=4 | 713.53 | 6.0474 | black | [9] |
| Pr4(P1−xSix)3-z | cubic | I43d | [9] | ||||
| Nd4(P1−xSix)3-z | cubic | I43d | [9] | ||||
| Gd4Co13(Si, P)9 | P6m2 | a = 10.419,c = 37.27 | [10] | ||||
| Sm4Co13(Si, P)9 | P6m2 | [10] | |||||
| Tb4Co13(Si, P)9 | P6m2 | [10] | |||||
| Dy4Co13(Si, P)9 | P6m2 | [10] | |||||
| Ho4Co13(Si, P)9 | P6m2 | [10] | |||||
| Er4Co13(Si, P)9 | P6m2 | [10] | |||||
| Hf27Si6P10 | Immm | a = 3.5739, b = 18.623, c = 23.081, Z = 2 | 11.443 | P2 groups | [11] |